HCF Worksheet
The trick (Sankalana-Vyavakalanabhyam): Take the smaller number away from the bigger one, as many times as it goes. Now use the smaller number and what is left. Repeat until nothing is left: the last number before 0 is the HCF.
NameDateTime takenScore ___ / 40
- 1.HCF of 85 and 15 =
- 2.HCF of 150 and 275 =
- 3.HCF of 54 and 180 =
- 4.HCF of 120 and 165 =
- 5.HCF of 304 and 95 =
- 6.HCF of 10 and 35 =
- 7.HCF of 210 and 357 =
- 8.HCF of 126 and 342 =
- 9.HCF of 133 and 228 =
- 10.HCF of 16 and 36 =
- 11.HCF of 27 and 6 =
- 12.HCF of 440 and 154 =
- 13.HCF of 26 and 18 =
- 14.HCF of 21 and 24 =
- 15.HCF of 140 and 42 =
- 16.HCF of 190 and 160 =
- 17.HCF of 90 and 50 =
- 18.HCF of 374 and 242 =
- 19.HCF of 44 and 143 =
- 20.HCF of 16 and 20 =
- 21.HCF of 200 and 140 =
- 22.HCF of 150 and 175 =
- 23.HCF of 144 and 32 =
- 24.HCF of 360 and 126 =
- 25.HCF of 15 and 48 =
- 26.HCF of 144 and 162 =
- 27.HCF of 165 and 120 =
- 28.HCF of 22 and 6 =
- 29.HCF of 35 and 20 =
- 30.HCF of 120 and 18 =
- 31.HCF of 28 and 182 =
- 32.HCF of 75 and 100 =
- 33.HCF of 126 and 108 =
- 34.HCF of 69 and 230 =
- 35.HCF of 85 and 45 =
- 36.HCF of 322 and 115 =
- 37.HCF of 42 and 399 =
- 38.HCF of 104 and 56 =
- 39.HCF of 184 and 345 =
- 40.HCF of 28 and 35 =
Answer key
- 5
- 25
- 18
- 15
- 19
- 5
- 21
- 18
- 19
- 4
- 3
- 22
- 2
- 3
- 14
- 10
- 10
- 22
- 11
- 4
- 20
- 25
- 16
- 18
- 3
- 18
- 15
- 2
- 5
- 6
- 14
- 25
- 18
- 23
- 5
- 23
- 21
- 8
- 23
- 7
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