KA-0121●●○4 points, difficulty 2 of 34 ptLevel 5–6not yet calibratedEveryone at a meeting shakes hands with everyone else exactly once. There are 66 handshakes in total. How many people are there?CFT-03Try small cases firstalso CNT-08, PAT-04
KA-0122●●○4 points, difficulty 2 of 34 ptLevel 5–6not yet calibratedWhich of these numbers has exactly 6 different whole-number factors, counting 1 and the number itself?CFT-04Back-solve from the answer choicesalso NUM-05
KA-0123●●○4 points, difficulty 2 of 34 ptLevel 5–6not yet calibratedA rectangle has an area of 36 and sides that are whole numbers. Which of these could NOT be its perimeter?CFT-05Eliminate impossible choices by boundingalso GEO-01, NUM-05
KA-0124●○○3 points, difficulty 1 of 33 ptLevel 5–6not yet calibratedWhich of these is closest to the number of seconds in one day?CFT-06Estimate to the nearest choicealso MOD-07, NUM-12
KA-0125●●●5 points, difficulty 3 of 35 ptLevel 5–6not yet calibratedWhat is the value of (1 - 1/2) x (1 - 1/3) x (1 - 1/4) x ... x (1 - 1/10)?CFT-07Spot the trick vs. decide to grindalso NUM-09, CFT-03
KA-0126●●●5 points, difficulty 3 of 35 ptLevel 5–6not yet calibratedYou are 20 minutes into a 75-minute paper of 30 questions, still on question 9, and four minutes in with no progress. What is the best move?CFT-08Time triage: now, later, or guessalso CFT-09, CFT-12
KA-0127●○○3 points, difficulty 1 of 33 ptLevel 3–4not yet calibratedOne minute is left. Three questions have no answer written and you cannot do any of them. Nothing is taken off for a wrong answer. What should you do?CFT-09Never leave a blank — there is no penaltyalso CFT-08
KA-0128●●○4 points, difficulty 2 of 34 ptLevel 5–6not yet calibratedA rectangle measures 30 cm by 0.4 m. What is its area in square centimetres?CFT-10Check units and re-read before bubblingalso MOD-07, GEO-01
KA-0129●●○4 points, difficulty 2 of 34 ptLevel 5–6not yet calibratedWork out 17 x 24, then check it a second way before you commit to an answer.CFT-11Sanity-check with a second methodalso NUM-08, CFT-06
KA-0130●●●5 points, difficulty 3 of 35 ptLevel 5–6not yet calibratedYou reach the ten 5-point questions with 18 minutes left. What is the best plan?CFT-12Managing the 5-point blockalso CFT-08, CFT-09
KA-0131●●○4 points, difficulty 2 of 34 ptLevel 3–4not yet calibratedTwice a number, with 3 added, gives 17. Which of the choices is the number?CFT-04Back-solve from the answer choicesalso MOD-01, LOG-08
KA-0132●●○4 points, difficulty 2 of 34 ptLevel 3–4not yet calibratedAna has exactly 5 coins, each worth either 2 cents or 5 cents. Which of these could NOT be her total?CFT-05Eliminate impossible choices by boundingalso CNT-04, NUM-06