Problem: Article: Rinse 4 mangoes under running water to get any dirt particles off. Use a serrated vegetable peeler to remove all of the skin. Cut them in half and try to cut away as much meat from the pit as you can. Cut each mango into small slices or 1 inch (2.54 cm) pieces. Ensuring the fruit is in small pieces will be very helpful in cooking and pureeing.
Summary: Wash the mangoes. Peel and core them. Cut the mangoes.

Problem: Article: Fruit juice isn't the only thing that can keep bananas from turning an unappealing brown. For example, soda water and club soda are known for their ability to keep sliced fruit fresh. Best of all, these liquids have the added benefit that they don't affect the taste of banana. Use them as you would use fruit juices, soaking the slices in the soda water before serving or storing them. Be sure to use soda water or club soda. Tonic water, a beverage that looks the same, has a strong flavor that doesn't go well with bananas. Tap water doesn't work quite as well as fruit juice or the other solutions in this article, but it's something you'll always have available and it's basically free. This, too, is used the same as the fruit juices: soak the banana slices in the water before using them how you wish. Citric acid (the same chemical that makes citrus fruits like lemons sour) is sold in a purified form as a canning additive. In this form, it is specifically used to keep fruit from discoloring as it stores. However, it's often difficult to find pure citric acid. Your best bet will usually be a health food store or a hardware store. Luckily, it is not especially expensive — less than $10 for a small bottle is common. To use citric acid, add three teaspoons to a cup of water and mix. Soak the slices in the bath as normal. Don't use undiluted citric acid, as it is far too sour. Vinegar can be used similarly to citric acid to keep fruit fresh. However, its strong sourness also makes it necessary to dilute it. As with citric acid, add a few teaspoons to a cup of water to make a bath and soak the banana pieces as normal. Ascorbic acid, or vitamin C, is another acid that can keep fruit from turning brown. Powdered vitamin C can usually be found in most supermarkets as a cold-fighting supplement. Dissolve this in water (according to the directions on the package) to make a bath and soak the banana slices as normal. If you're in a pinch, a ground-up vitamin C tablet works as well. Since banana slices turn brown when they are exposed to the oxygen in the air, keeping the fruit from physically touching the air will prevent the browning reaction from occurring. There are many ways to do this. A few are listed below.  One easy trick involves wax paper. Cut the slices so that they are all about the same slice, then lay them on a tray. Cut a square of wax paper to fit the tray, then lay it down over the slices and gently press it down so it sticks to each. The banana slices will be sandwiched between the paper and the tray without any air exposure. If you have the time, you can also cut small squares of wax paper of plastic wrap and lay them individually over each slice. Be sure to remove them before you eat.  If you have a vacuum storage device (e.g., Food Saver, etc.), you can also try packing the slices in an air-free container.
Summary: Use soda water. Use tap water. Use diluted citric acid. Use diluted vinegar. Use dissolved vitamin C. Limit exposure to air.

Problem: Article: Running and jogging is a great steady-state cardio exercise to burn fat.  If you can jog fast or run, you'll burn more calories and help decrease body fat.  In general, you can burn about 100 calories per mile when you're running.  In addition, running is a great exercise for cardiovascular health.  If you're not a runner, start slow.  You can start with jogging a mile first and slowly increase your distance or pace over the course of several weeks. Spin classes and high intensity biking is another great exercise that will burn large amounts of calories and fat.  Spin class is done indoors on a stationary bike.  You can control your speed and resistance on the bike.  However, the harder you work and the faster you pedal, the better fat burn you'll get. If you haven't tried a spin class before, it's important to take your first few classes slowly.  They are very high intensity and it may take a few weeks to bring up your fitness levels. Spin is also generally done inside in a closed room.  You can get very hot and sweat a lot.  It's important to re-hydrate continually throughout a spin class. Step aerobics is a another great cardio class to help you burn calories and fat.  It's particularly effective due to it's focus on your legs and glutes.  These large muscle groups make you work up a sweat causing you to burn calories and fat.  You may burn up to 400 calories in 30 minutes if you work out at your hardest intensity. Again, if you haven't done a step aerobics class, start slowly.  Use a smaller step and any modifications to movements that are too difficult for you.  Over time, you can use a bigger step or do movements without modifications. Another type of cardio activity is HIIT. This type of cardio burns more calories from fat and also raises your metabolism for about 24 hours after you've completed the workout.  During HIIT you alternate between short bouts of very high-intensity cardio and short bouts of more moderate-intensity cardio.  You do not spend as much time doing HIIT compared to steady state cardio exercises, usually about 20 minutes (with an additional 5 minutes at the beginning and end for a warm up and cool-down). They are intended to be shorter, more vigorous exercises. Studies have shown that there is a close relationship between the intensity of cardio exercises and the reduction of stomach fat.  Participating in HIIT may be very effective for reducing abdominal fat.
Summary:
Run or jog. Do a spin class or include high intensity biking. Step aerobics. Do high-intensity interval training (HIIT).