Others Maths Puzzle

When you reverse the digits of the number 13, the number increases by 18. How many other two digit numbers increase by 18 when their digits are reversed?

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other such nos are 24,35,46,57,68,79 .. 6 nos
13 years agoHelpfull: Yes(6) No(0)

Others Other Question

How many six-digit numbers can be made by using the first 6 natural numbers such that the digit at the unit’s place is greater than the digit at the hundred’s place and the number thus formed is a multiple of 4? (Repetition of digits is not allowed.) Rahim plans to drive from city A to station C, at the speed of 70 km per hour, to catch a train arriving there from B. He must reach C at least 15 minutes before the arrival of the train. The train leaves B, located 500 km south of A, at 8:00 am and travels at a speed of 50 km per hour. It is known that C is located between west and northwest of B, with BC at 60° to AB. Also, C is located between south and southwest of A with AC at 30° to AB. The latest time by which Rahim must leave A and still catch the train is closest to

6:15 am
6:30 am
6:45 am
7:00 am
7:15 am