Prime Factorisation Worksheet A Worksheets increase in difficulty

Prime Factorisation – Worksheet A Worksheets increase in difficulty and are in three sizes

Printing To print handouts from slides Select the slide from the left. Then click: File > Print > ‘Print Current Slide’ To print multiple slides Click on a section title to highlight all those slides, or press ‘Ctrl’ at the same time as selecting slides to highlight more than one. Then click: File > Print > ‘Print Selection’ To print double-sided handouts Highlight both slides before using ‘Print Selection’. Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

① Prime Factorisation Grids Each circle contains the prime factors of the number in the triangle. Can you complete each puzzle? A) 3 70 175 3 8 28 3 105 20 3 42 63 B) 30 3 28 245 98 3 3 130 75 231 273 3 325 117 3 3 99 27 3 3 105 70 363 3 195 50 75 385 182 3 3 45 3 30 125 3 18 12 45 50 18 42

② Prime Factorisation Grids Each circle contains the prime factors of the number in the box. Can you complete each puzzle? A) Prime Factorisation Grid Each circle contains the prime factors of the number in the box. Can you complete the puzzle? C) 90 60 84 36 16 54 24 104 858 330 100 56 60 198 132 16 40 495 135 90 36 726 210 315 81 B) 100 60 36 198 88 196 294 126 40 16 24 132 156 84 140 490 56 84 54 90 546 462 550 350 140 126 81 135 56 1078 770 40

Prime Factorisation Grids Each circle contains the prime factors of the number in the triangle. Can you complete each puzzle? ① A) 5 2 3 70 175 5 2 3 8 28 7 3 105 20 42 3 3 12 30 45 3 98 99 27 3 3 105 70 18 42 7 3 11 3 195 50 363 117 53 11 231 13 3 125 2 7 3 385 273 325 5 5 182 5 3 3 245 130 75 45 7 2 3 75 3 28 35 5 3 18 2 125 30 3 B) 50 2 3 63 5 2 Answers

② Prime Factorisation Grids Each circle contains the prime factors of the number in the box. Can you complete each puzzle? A) 3 5 60 90 3 2 3 5 5 2 2 7 5 2 3 3 81 3 2 2 13 5 2 90 3 135 3 11 11 132 54 126 140 3 2 2 11 198 24 84 56 3 2 2 5 36 16 40 5 40 3 2 2 60 100 7 2 3 2 56 24 54 2 2 Can you complete the puzzle? C) 2 84 16 36 B) 3 Prime Factorisation Grid Each circle contains the prime factors of the number in the box. 3 13 104 60 495 726 88 156 546 2 3 3 2 2 3 7 858 198 135 210 196 84 462 11 3 5 7 7 2 11 1078 56 2 3 2 5 330 132 90 315 294 140 550 2 2 3 3 2 5 5 770 7 5 100 16 36 81 126 490 350 2 2 3 3 7 7 2 40 2 2

① Prime Factorisation Grids Each circle contains the prime factors of the number in the triangle. Can you complete each puzzle? A) 3 70 175 28 105 3 63 B) 30 3 28 245 98 30 45 50 99 27 3 3 105 70 3 18 42 45 28 245 98 3 130 75 231 273 3 325 117 3 3 99 27 3 3 105 70 363 3 195 50 75 385 182 3 3 45 3 3 117 3 30 125 3 18 12 3 195 3 63 363 50 20 42 B) 273 325 105 231 3 8 3 75 3 28 3 130 75 3 385 182 3 175 45 3 3 70 125 3 18 12 3 50 20 42 Prime Factorisation Grids Each circle contains the prime factors of the number in the triangle. Can you complete each puzzle? A) 3 8 3 ① 18 42

② Prime Factorisation Grids Each circle contains the prime factors of the number in the box. Can you complete each puzzle? A) Prime Factorisation Grid Each circle contains the prime factors of the number in the box. Can you complete the puzzle? C) 90 60 84 36 16 54 24 104 858 330 100 56 60 198 132 16 40 495 135 90 36 726 210 315 81 B) 100 60 36 198 88 196 294 126 40 16 24 132 156 84 140 490 56 84 54 90 546 462 550 350 140 126 81 135 56 1078 770 40

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