If six children and two dogs were under an umbrella, how come none of them got wet?

What Deficiency does the below rebus represent?

VIT_MIN

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Using eight eights and addition only, can you make 1000?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

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

What has 13 hearts but no other organs?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.