Question
Determine the smallest 4-digit number that, when divided
by 15, 24, and 30, leaves a remainder of 5 each time.Solution
Prime factorization of 15 = 3 1 Â X 5 1 Prime factorization of 24 = 2 3 Â X 3 1 Prime factorization of 30 = 2 1 Â X 3 1 Â X 5 1 LCM of (15, 24, and 30) = 2 3 Â X 3 1 Â X 5 1 Â = 8 X 3 X 5 = 120 Least 4-digit number divisible by 120 = 1,080 So, required number = 1080 + 5 = 1,085
Find the wrong number in the series given below.
7, 22, 68, 217, 625, 1880
Select the number from among the given options that is wrong in the following series.
22, 30, 46, 78, 146, 270
Find the wrong number in the given series.
60, 65, 75, 95, 125, 195, 355Â Â
Arrange the following words in a logical and meaningful order.
1. Monkey
2. Elephant
3. Rat
4. Fly
5. Lion
Find the wrong number in the given series.
17, 17, 51, 255, 1789, 16065
A series is given with two wrong terms. Select the wrong term in the given series.
32, 43, 58, 73, 92, 117, 144
A series is given with one wrong term. Select the correct alternative from the given ones that will complete the series.
33, 44, 66, 110, 199, 374
Select the wrong term in the series.
44, 47, 41, 50, 38, 53, 40
5, 15, 30, 135, 405, 1215, 3645
Find the wrong number in the series given below.
5, 16, 50, 157, 463, 1394
