Practice NAT questions with answers and explanations.
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Each term is multiplied by 3 and reduced by 1.
Thus, 41 × 3 - 1 = 122.
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The operations alternate between ×2 and -1.
After 13, multiply by 2 to obtain 26.
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The subtracted numbers are consecutive primes 2, 3, 5, 7.
Subtracting the next prime, 11, gives 22.
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The additions are 1, 4, 9, and 16, which are squares.
Adding 25 gives 57.
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The sequence increases by 3 each time.
Adding 3 to 12 gives 15.
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Each term is double the previous term.
Therefore, 16 × 2 = 32.
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The terms are consecutive perfect squares.
The next term is 5² = 25.
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The terms are consecutive cubes.
The next term is 5³ = 125.
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The increases are 2, 4, 6, and 8.
The next increase is 10, giving 35.
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The terms are factorials: 1!, 2!, 3!, and 4!.
The next term is 5! = 120.
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Successive increases are 2, 3, 4, and 5.
Adding 6 to 15 gives 21.
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Each term is the sum of the previous two.
Thus, 5 + 8 = 13.
