Read the row of digits below from left to right.
6 4 3 5 1 0 2 7 1 2 1 3 4 8 6 4 0 6 4 3 8 5 6 2 0
Take every two neighbouring digits of the row as a pair (1st and 2nd, 2nd and 3rd, and so on). How many of these pairs have a product of 12?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4
Each digit and the digit just after it form a pair, so the pairs are neighbours in the row. Only 2 × 6, 6 × 2, 3 × 4 and 4 × 3 give 12 with single digits. Going from left to right, the pairs whose product is 12 are:
4, 3 (2nd and 3rd digits)
3, 4 (12th and 13th digits)
4, 3 (19th and 20th digits)
6, 2 (23rd and 24th digits)
Every other neighbouring pair has a product other than 12.
So the answer is 4.