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?
A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?
John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?
Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true. * * x * ===== * * *
What three numbers, none of which is zero, give the same result whether they’re added or multiplied?
How do you go from 98 to 720 using just one letter?
There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?
John can place six large boxes or nine small boxes into a carton. Can you find out in how many cartons can he place sixty-six boxes in total?
You need to arrange three 7 and mathematical symbols to form number 1?
Find three whole, positive numbers that have the same answer when multiplied together as when added together.
I throw two dice simultaneously. What is the probability of getting a sum as 9 of the two numbers shown?
The inventor of the Rubik’s Cube didn’t realize he’d built a puzzle until he scrambled it the first time and tried to restore it.
