KRA CBT Aptitude Test flashcards
KRA CBT Aptitude Test · Build recall with a focused review session.
31 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Percentage change formula
- Subtract the old value from the new value, divide by the old value, and multiply by 100. Always divide by the original base, not the new figure.
- Successive percentage change
- Two percentage changes combine multiplicatively: net change equals a plus b minus ab divided by 100, where a is a rise and b a fall.
- Combined work formula
- If two workers alone need a and b days, working together they need ab divided by a plus b days, because their rates add.
- Average speed, equal distances
- When the same distance is covered at two speeds x and y, average speed is 2xy divided by x plus y, which is the harmonic mean, not the simple average.
- Compound versus simple interest
- Compound amount is principal times one plus rate over 100 raised to the number of years; the excess over simple interest grows with time.
- Alligation rule
- To mix two components priced high and low to reach a mean price, the quantity ratio is high minus mean to mean minus low.
- Divisibility by 11
- A number is divisible by 11 when the sum of digits in alternating positions differs by zero or a multiple of eleven.
- Main idea criterion
- The correct main-idea option must cover the entire passage. An answer true of only one paragraph is a detail, not the main idea.
- Valid inference test
- An inference must follow necessarily from the stated text. If the passage permits the opposite, the option is not an inference.
- Negation test for assumptions
- Negate the candidate assumption. If the argument then collapses, the statement was a required assumption; if it survives, discard the option.
- Scope qualifiers in options
- Words such as all, only, never and must strengthen a claim. Unless the passage states them explicitly, such options are usually wrong.
- Para-jumble opening sentence
- The first sentence usually introduces a topic or definition and contains no pronoun or connective referring backward. Use it to anchor the sequence.
- Analogy relation types
- Identify the relation before the words: cause to effect, part to whole, category to member, or degree of intensity. Match the same relation in options.
- Contrapositive validity
- From 'if P then Q' you may infer 'if not Q then not P'. You may not infer 'if Q then P', which is the invalid converse.
- Syllogism with two negatives
- Two negative premises yield no valid conclusion linking the terms. One negative premise forces a negative conclusion.
- Opposite alphabet position
- Letters are numbered A as 1 through Z as 26. The opposite letter of position n sits at 27 minus n.
- Interleaved series rule
- In long number or letter series, test odd and even positions separately. Many series are two simple patterns alternating.
- Facing-direction left and right
- Left and right reverse with facing direction. Facing north, left is west; facing south, left is east. Convert before plotting movement.
- Odd-one-out verification
- State the candidate shared property and test it against every item. If any item fails, the rule is wrong and another property is needed.
- Confusable character pairs
- Check 0 and O, 1 and l, 5 and S, 2 and Z, 8 and B, rn and m, vv and w first when comparing strings for mismatches.
- Transposition error detection
- Swapped adjacent characters keep the same character set. Compare position by position rather than checking whether all characters are present.
- Chunked string comparison
- Break both strings into fixed groups of two or three characters and compare group by group. This catches single-character substitutions faster than whole-word reading.
- Unit check in data sets
- Before computing, confirm whether table values are absolute, in thousands, or percentages. A unit misread invalidates every derived answer.
- Weighted mean from a table
- Multiply each value by its frequency, sum those products, then divide by the total frequency. Equal group sizes are required for a simple mean of averages.
- CAGR formula
- Compound annual growth rate equals end value divided by start value, raised to the power one over n, minus one, where n counts intervals.
- Pie chart absolute values
- A pie slice gives only a share of the whole. Converting it to a number requires the total, and two pies with different totals cannot be compared by angle alone.
- Correlation versus causation
- Two series moving together show association only. A chart cannot establish that one variable causes the other without additional evidence.
- Situation priority order
- Rank safety and legal compliance highest, then accuracy and client impact, then team relationships, and personal convenience last.
- Escalation decision rule
- Escalate immediately for risk to safety, law, or data integrity. Handle routine issues at the lowest level with authority to resolve them.
- Error ownership ranking
- Disclosing your own mistake and proposing a fix ranks highest. Silent self-correction ranks lower, and concealment ranks lowest.
- Confidential information handling
- Share only with people who need the information to do the task. Follow policy or obtain consent before any wider disclosure.