Let the ages of the second and third children be x years. Their combined age = 2x = 24, so x = 12 years. Let the age of the youngest child be y years, and the eldest be y + 10 years. Average age = (y + (y + 10) + 12 + 12) / 4 = 12 (y + y + 10 + 24) / 4 = 12 (2y + 34) / 4 = 12 2y + 34 = 48 2y = 14 y = 7 years Age of the eldest child = 7 + 10 = 17 years.
The downstream speed of a boat is 6 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream ...
Find the number which does NOT belong to the group : 101, 242, 363, 484
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the equation.
1496 * 8 * 13 * 40 * 5 * 0
Select the number-pair in which the two numbers are related in the same way as are the two numbers of the following number-pair.
7 : 85
87 25 36
44 22 13
What is the sum of the resultants of the two rows?
...If the positions of the second and the third digit of each of the numbers are interchanged, how many odd numbers will be formed?
Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is relate...
If the numbers 1 and 2 are interchanged, 3 and 4 change places and also the symbols × and ÷, then find the value of 1 + 3 × 2 ÷ 4.
...Select the set in which the numbers are related in the same way as are the numbers of the following sets.
( NOTE: Operations should be perf...
Which two numbers should be interchanged to make the given equation correct?
9 + 7 × 5 − 18 ÷ 2 = 3 × 4 − 10 + 45 ...
