1, 4, 9, 16, 20, 36, 49

The sequence is: 53, 53, 40, 40, 27, 27, ... What is the next number in the sequence?

Which number in the given options does not follow the pattern of being expressible as n³ + n?

 
Find the speed of the train, if a train 142 m long passes a pole in 6 seconds. 

Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:

If a number is decreased by 2 and divided by 3, the result is 4. What would be the result if 1 is subtracted from the number and then it is divided by 2?

If 4 numbers are in Arithmetic Progression are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

A man leaves a point P at 6 a.m. and reaches the point Q at 10 a.m. Another man leaves the point P at 8 a.m. and reaches the point P at 12 noon. At what time do they meet?

 If the length of a certain rectangle is decreased by 4 cm and the width is increased by 3 cm, a square with the same area as the original rectangle would result. Find the perimeter of the original rectangle. 

 Find the error in the underlined sentence and answer the correct one from the given options.

The expedition did not enter the water-filled clearing because it believed that to do it endangers the rare Spanish moss hanging from the trees.