Question

tell me some logic questions on maths with answers

Answer 1

hey there,

Question 1: Car A began a journey from a point at 9 am, traveling at 30 mph. At 10 am car B started traveling from the same point at 40 mph in the same direction as car A. At what time will car B pass car A?
Solution: Let after t hours the distances D1 traveled by car A

=> D1 = 30 t

Car B starts at 10 am and will therefore have spent one hour less than car A when it passes it.

After (t - 1) hours, distance D2 traveled by car B

=> D2 = 40 (t - 1)

When car B passes car A, they are at the same distance from the starting point and therefore D1 = D2

=> 30 t = 40 (t - 1)

Solve the equation for t,

=> 30 t = 40t - 40

=> 10 t = 40

=> t = 4

=> Car B passes car A at = 9 + 4 = 13 pm.

Another could be:
Question 2: Four times the first of three consecutive even integers is six more than the product of two and the third integer. Find the integers.

Solution: First integer = x

Second integer = x + 2

Third integer = x + 4

Since four times the first integer equals six more than the product of two and the third integer.

=> 4x = 6 + 2(x + 4)

=> 4x = 6 + 2x + 8

=> 2x = 14

=> x = 7.

Hence,

First integer = x = 7

Second integer = x + 2 = 7 + 2 = 9

Third integer = x + 4 = 7 + 4 = 11.

Answer 2

find the smallest +ve mathematical number which is spelled in an alphabetical order
ans-40

replace ? by mathematical symbol to make the equation true
18 ? 12 ? 4 ? 5 = 59
ans- 18*12/4+5=59

1pound=100penny
=10penny*10penny
=1/10pound*1/10pound
=1/100pound
=1penny
=>1pound=1penny
ans- step 3 is wrong