If n! - n = n, then the value of n is:

 Find the remainder when 67^99 is divided by 7.

 

Find the wrong number in the sequence:

3, 7, 15, 39, 63, 127, 255, 511

 If each edge of a cube is increased by 50%, find the percentage increase in its surface area. 

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then the sum of the digits in N is:

 What is the corresponding postfix expression for the given infix expression? 

 

a+(b*c(d/e^f)*g)*h)

An industrial loom weaves 0.128 meters of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 meters of cloth?

 If Reena says, “Anjali's father Raman is the only son of my father-in-law Ramanand”, then how is Piyu, who is the sister of Anjali, related to Ramanand? 

 If a shopkeeper mixes 10 kg of apples costing Rs. 30 per kg with 20 kg of apples costing Rs. 60 per kg and sells the mixture at Rs. 60 per kg. His profit percent is: 

 
I forgot the last digit of a 7 digit telephone number. If one randomly dial the final three digits after correctly dialling the four, then what is the chance of dialling the correct number?