2020 NECO Mathematics Past Questions

How much heat is required to convert 5.0g of ice at 0 ° C to water at the boiling point? (Specific latent heat of ice = 336Jg-1 specific heat capacity of water = 4.2Jg-1K-1)

1. A.420 J
2. B.1680 J✓ Correct
3. C.1701 J
4. D.2100 J
5. E.3780 J

Which scientist discovered natural radioactivity?

1. A.Enrico Fermi
2. B.Henri Becquerel✓ Correct
3. C.Marie Curie
4. D.Micheal Faraday
5. E.Niels Bohr

Rationalize the expression $\frac{(7 - \sqrt{3})}{(13 - \sqrt{3})}$

1. A.(44 + 3$\sqrt{3}$) ÷ 83
2. B.(44 + 2$\sqrt{3}$) ÷ 83✓ Correct
3. C.(44 - 3$\sqrt{3}$) ÷ 83
4. D.(44 - 4$\sqrt{3}$) ÷ 83
5. E.(44 - 2$\sqrt{3}$) ÷ 83

The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth?

1. A.1.92N
2. B.2.88N
3. C.6.72N✓ Correct
4. D.8.00N
5. E.12.00N

What is the escape velocity of a satellite launched from the earth’s surface? (Take g as 10ms$^{-2}$ and the radius of the earth as 6.4 × 10$^6$m)

1. A.7.80 × 10k$ms^{-1}$✓ Correct
2. B.11.2 × 10k$ms^{-1}$
3. C.3.56 × 107$ms^{-1}$
4. D.6.00 × 107$ms^{-1}$
5. E.1.20 × 108$ms^{-1}$

A wire was shaped to form a square of area 81cm$^2$. An equilateral triangle was formed by the same wire,What is the length of a side of the triangle formed?

1. A.3cm
2. B.6cm
3. C.9cm
4. D.12cm✓ Correct
5. E.27cm

The African Development Bank was set up in 1964 and has its headquarters in

1. A.A. Burkina Faso
2. B.B. Ivory Coast
3. C.C. Liberia✓ Correct
4. D.D. Niger Republic
5. E.E. Senegal

The hormones produced in the hypothalamus are

1. A.auxin and somatotropium
2. B.oxytocin and vasopressin
3. C.parathormone and progesterone
4. D.testosterone and insulin✓ Correct
5. E.thyroxine and nor-adrenalin

Choose from the options lettered A- E the one that is most nearly opposite in meaning to the word or expression in italics Your action is in negation of our earlier decision.

1. A.connection with
2. B.consonance with
3. C.contrast with✓ Correct
4. D.disrespect to
5. E.opposition to

Choose from the options lettered A - E the one that contains the sound segment represented by the given phonetic symbol /θ/

1. A.tank
2. B.teethe✓ Correct
3. C.thank
4. D.they
5. E.this