exam Maths Puzzle Numerical Ability

a jet plane travelling at a constant speeed goes 1200 mi with the wind , then turns around and travel for 1000 mi against the wind . If the speed of the wind is constant 50mph , an

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a three digit number is 28 times the sum of its digits. the units digit is twice the tens digit and 3 more than the hundreds digit. Find the number the quality control inspector will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Suppose the bat