Video: KS2-M19 • Paper 2 • Question 8

In this sequence, the rule to get the next number is as follows. Multiply by 2, and then add 3. Write the missing numbers. _ 25 53 _

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Video Transcript

In this sequence, the rule to get the next number is as follows. Multiply by two, and then add three. Write the missing numbers. What, 25, 53, and what.

The first number in the sequence is not given. We reach 25 by multiplying this missing number by two and then adding three. So to find the first number in the sequence, our missing number, we need to work backwards. We need to take away three from 25 and divide the answer by two. 25 take away three is 22. And 22 divided by two is 11. So the first missing number is 11. 11, 25, 53, our missing number.

To find this number, we can follow the rule. We need to multiply 53 by two, which is 106, and then add three to 106. Double 53 plus three equals 109.

The two missing numbers in the sequence are 11 and 109.

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