let's assume height of the table is T and cat is C and R of tortoise. let's write down the equations T + C - R = 170cm T + R - C = 130cm add both the equations 2T + C - R + R - C = 170 + 130 cm 2T = 300cm T = 150cm
Start both 7 min & 4 min hour glass at the same time. Once 4 hour glass completes then reverse it; now 7 hour glass is at 4 min and 3 min remaining. When 7 hour glass completes then reverse it. the reversed 4 hour glass still has 1 min to complete. After you reverse 7 hour glass wait until the 4 hour glass to be completed thereby your total is 9 min.
Q.6 : Guess the five letter word from this image :
Q.7 : Danish is throwing Sachin a surprise birthday party but he has to stay within his budget. He spent half of his money plus Rs.2 on the cake. Half of what he had left plus Rs.2 was spent on balloons. Then he spent half of what he had left plus Rs.1 on toffees. Now he is out of money; how much did he start with?
This one is best solved working backwards; the last part Danish spent half of what was left plus Rs.1 on toffees and then was out of money. That means he must have spent Rs.2 on toffees as Rs.1 was half of what he had using the same logic backwards: Rs.2 on toffees Rs.6 on Balloons Rs.12 on the cake Total of Rs.20.
Q.8 : A man buys a banana from a woman for Rs.3/- and gives the woman a Rs.10/- note. The woman goes into the next door shop to get change. She returns and gives the man Rs.7/- After the man leaves; the clerk from the store comes and says; "Hey; that was a counterfeit note you gave me." The woman gives the clerk a real note of Rs.10/-. How much has the woman lost?