Question 3
EasyOriginal questionA matrix has 10 elements. How many different orders can it have?
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
An order m × n needs , so m can be any divisor of 10.
The divisors give the orders 1 × 10, 2 × 5, 5 × 2, 10 × 1: 4 in all.
Worth noting
2 counts only m ≤ n, but 1 × 10 and 10 × 1 are different orders.
- Concept
- Possible orders of a matrix
- Typical timeTypical
- 60 s
- Your timeYours
- —
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