How do you go from 98 to 720 using just one letter?

What jumps when it walks and sits when it stands?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

What word begins and ends with an E, but has only one letter?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I have Rs.50 and I spend it in the way as below.

In the image given, you can find several triangles. Can you count them all?