Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 890 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
2. 2.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 9 PM (c) 10 PM (d) 6 PM
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
5. 5.🧩 Nisha bought 6 kites and a lunch box for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹100 (c) ₹94 (d) ₹16
6. 6.🧩 Vihaan is 12 years old. Aarav is older than Vihaan. How old is Aarav? (a) 14 (b) 17 (c) 13 (d) not enough info
7. 7.🧩 Tara bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹135 (d) ₹50
8. 8.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
10. 10.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
11. 11.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
12. 12.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
14. 14.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
15. 15.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 15 (b) 20 (c) 8 (d) not enough info
16. 16.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 3 PM
17. 17.🧩 Meera is 12 years old. Arjun is older than Meera. How old is Arjun? (a) 13 (b) 14 (c) 17 (d) not enough info
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Nisha bought 6 kites and a cap for ₹440 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹73 (c) ₹434 (d) ₹440
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
22. 22.🧩 Aarav bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹75
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
25. 25.🧩 Kabir bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹135 (b) ₹50 (c) not enough info (d) ₹45
26. 26.🧩 Ishaan bought 3 pens and a lunch box for ₹190 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹187 (c) ₹63 (d) ₹190
27. 27.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) 4 PM (d) not enough info
28. 28.🧩 Aarav bought 4 notebooks and a bag for ₹280 in all. Each notebook cost the same. What did one notebook cost? (a) ₹276 (b) not enough info (c) ₹280 (d) ₹70
29. 29.🧩 Tara bought 4 pens and a lunch box for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹170 (b) ₹42 (c) ₹166 (d) not enough info
30. 30.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
31. 31.🧩 A box has 3 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 32 (b) 24 (c) not enough info (d) 11
32. 32.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) 9 PM (d) not enough info
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
34. 34.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
35. 35.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
36. 36.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
37. 37.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
38. 38.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
40. 40.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids