An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

You need to remove two matchsticks to make the below equation true. Can you do it ?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I have no life, but I can die. What am I?