Question
A farmer traveled a distance of 61 km in 9 hours. He
traveled partly on foot at the rate of 4 km per hour and partly on bicycle at the rate of 9 km per hour. The distance travelled on foot is:Solution
(x/4) + [(61 – x)/9] = 9 9x + 4 × 61 – 4x = 36 × 9 5x + 244 = 324 x = 80/5 = 16 km
64, 80, 120, 210, ?, 945
Find the missing number, in the given number series.
60, 150, ?, 450, 450, 225
What will come in place of the question mark (?) in the following series?
48, 291, ?, 399, 408, 411
98, 134, 198, ?, 442, 638
216, 81, 297, 378, ?, 1035, 1728
Which of the following numbers will replace the question mark (?) in the given series?
17, 30, 44, 59, 75, ?
114, 134, 174, 254, 414, ?Â
10296/72 + 3040 = (? × 4) + 1395
5, 6, 14, 45, ?, 925
4.8, 14, 62, ?, 1516, 7578Â