Complete the number series: 3, 7, 6, 5, 9, 3,12, 1,15, …… A) 21 B) -3 C) -1 D) 13 Solution There are two series, beginning respectively with 3 and 7. In one 3 is added and in another 2 is subtracted.The next number is 1 – 2 = -1 1st Series 2nd Series 3 + 3 =6 7 – 2 = 5 6 + 3 = 9 5 – 2 = 3 9 + 3 = 12 3 – 2 = 1 12 + 3 = 15 1 -2 = -1 Related MCQs: Complete the number series: 6, 11, 21, 36, 56, …….? Complete the series: 5,9,17,33 …….? Complete the number series: 0.5,1.5, 4.5,13.5. ……. 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?