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SSC GD Elementary Mathematics Flashcards
50 question-and-answer cards covering Elementary Mathematics as it is examined in SSC GD. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Elementary Mathematics deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
What is the divisibility rule for 9?
A number is divisible by 9 if the sum of its digits is divisible by 9.
What is the divisibility rule for 4?
A number is divisible by 4 if the number formed by its last two digits is divisible by 4.
What is the divisibility rule for 11?
A number is divisible by 11 if the difference between the sum of digits at odd places and even places is 0 or a multiple of 11.
What is the divisibility rule for 8?
A number is divisible by 8 if the number formed by its last three digits is divisible by 8.
What is the formula for ratio in simplest form?
Divide both terms of the ratio by their HCF. For example, 8:12 = 2:3 (dividing by 4).
In a proportion a:b = c:d, what is the rule of cross-multiplication?
Product of means = product of extremes, i.e., b × c = a × d.
What is the sum of the first n natural numbers?
Sum = n(n + 1) / 2.
What is the sum of the first n odd natural numbers?
Sum = n² (the square of the number of terms).
What is the value of (a + b)²?
(a + b)² = a² + 2ab + b².
What is the value of (a − b)²?
(a − b)² = a² − 2ab + b².
What is the value of (a + b)(a − b)?
(a + b)(a − b) = a² − b².
How do you find the square of a number ending in 5, e.g., 35²?
Multiply the tens digit by the next number and append 25. For 35: 3 × 4 = 12, so 35² = 1225.
What is the average speed for a round trip at speeds x and y over the same distance?
Average speed = 2xy / (x + y).
What is the formula for the area of a rhombus given its diagonals?
Area = (1/2) × d₁ × d₂, where d₁ and d₂ are the lengths of the diagonals.
What is the formula for the area of a trapezium?
Area = (1/2) × (sum of parallel sides) × height.
What does BODMAS stand for?
Brackets, Of, Division, Multiplication, Addition, Subtraction — the order of operations for simplifying expressions.
How do you find a percentage of a number, e.g., 20% of 150?
Multiply the number by the percentage divided by 100. 20% of 150 = (20/100) × 150 = 30.
If a number is increased by x%, what is the multiplying factor?
Multiply by (1 + x/100). For a decrease of x%, multiply by (1 − x/100).
What is the formula for work done when one person finishes a job in n days?
One day's work = 1/n of the total work.
If A does a work in 'a' days and B in 'b' days, how long do they take together?
Time together = (a × b) / (a + b) days.
What is the value of π (pi) commonly used in calculations?
π ≈ 22/7 or approximately 3.14.
What is the relationship between Marked Price, Discount, and Selling Price?
Selling Price = Marked Price − Discount; Discount % = (Discount / Marked Price) × 100.
What is the formula for the perimeter (circumference) and area of a semicircle of radius r?
Perimeter = πr + 2r; Area = (1/2)πr².
How is a decimal converted to a percentage?
Multiply the decimal by 100. For example, 0.25 = 0.25 × 100 = 25%.
What this deck covers
The Elementary Mathematics deck follows the SSC GD Elementary Mathematics syllabus — 17 chapters and 0 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 2.9 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 62 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Elementary Mathematics flashcards FAQ
How many Elementary Mathematics flashcards are in this SSC GD deck?
50 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these SSC GD flashcards free?
Yes. The preview here is free to read with no signup, and the full 50-card deck is free inside the Examius app.
What do the Elementary Mathematics cards cover?
They follow the SSC GD Elementary Mathematics syllabus — 17 chapters and 0 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.