Identify the 10 differences between the two given pictures.

What is next number in the pattern below:

131 517 192 123 ?

If 21x = 79x, what is the value of x?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Find the next number in the series below

21 32 54 87 131 ?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I am quite hot but become too cold if you remove the first two letters. What am I?

Which is faster, Heat or Cold ? Explain.