Last week’s answer: £16X + £4Y. She works for four days a week, earning £X on each day, so each week she earns £4X plus her weekly bonus of £Y. For four weeks, you must multiply both values by four to get (4 x £4X = £16X) + (4 x £Y = £4Y) = £16X + £4Y.
This week’s problem: What is the next number in the sequence 1, 2, 4, 8, 16 . . . ?
The answer will be in next week’s weekly problem.