2021 WAEC (WASSCE) Mathematics Past Questions

The colours of the visible light region of the electromagnetic spectrum that have the shortest and longest wavelengths respectively are

1. A.red and blue.✓ Correct
2. B.indigo and violet
3. C.violet and red.
4. D.yellow and blue.

Military rule does not only pose a threat to democracy but also to

1. A.A. fundamental human rights
2. B.B. national borders
3. C.C. nationalism and patriotism✓ Correct
4. D.D. state sovereignty

The law of definite proportions states that

1. A.pure samples of the same compound contain the same elements combined in the same proportion by mass
2. B.pure samples of substances are in the same proportion by mass
3. C.chemical compounds are pure because they contain the same elements✓ Correct
4. D.matter can neither be created nor destroyed.

The set of instructions written by computer experts to solve specific task of the user is called?

1. A.A.  operating system.
2. B.B. application software.
3. C.C.  system software.✓ Correct
4. D.D.  utility software

An inductor is connected to a 24V, 50Hz mains supply. If the current through the inductor is 1.5A, calculate the inductance of the inductor ($\pi = \frac{22}{7}$)

1. A.8.0 x 102H✓ Correct
2. B.7.5 x 10oH
3. C.1.6 x 10oH
4. D.5.1 x 10-2H

From the word lettered A to D, choose the word that has the same consonant sound(s) as the one represented by the letter(s) undelined  bat

1. A.limb✓ Correct
2. B.dumb
3. C.subtle
4. D.nimble

From the words lettered A to D below each of the following sentences, choose the word that is nearest in meaning to the underlined word. The chairman observed that Andrew was the most qualified candidate for the job

1. A.suitable✓ Correct
2. B.accommodating
3. C.responsible
4. D.interesting

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. James appears ............ wiser than his friends.

1. A.more
2. B.much more
3. C.most✓ Correct
4. D.much

Expenditure on food takes a large proportion of the incomes of people in

1. A.industrialized countries
2. B.advanced countries✓ Correct
3. C.developing countries
4. D.capitalist countries

A boy 1.4 m tall, stood 10m away from a tree of height 12 m. Calculate, correct to the nearest degree, the angle of elevation of the top of the tree from the boy's eyes.

1. A.70º
2. B.47º
3. C.19º✓ Correct
4. D.8º