Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 449 · 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.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
2. 2.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
3. 3.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
4. 4.🧩 Saanvi is 11 years old. Ishaan is 8 years older than Saanvi. How old is Ishaan? (a) 8 (b) not enough info (c) 20 (d) 19
5. 5.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 63 (b) 16 (c) 72 (d) not enough info
6. 6.🧩 Meera is 6 years old. Arjun is 2 years older than Meera. How old is Arjun? (a) 2 (b) not enough info (c) 8 (d) 9
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
10. 10.🧩 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
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Meera bought 3 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) ₹75 (c) not enough info (d) ₹25
13. 13.🧩 Vihaan bought 4 kites and a bag for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹236 (d) ₹240
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
16. 16.🧩 Tara bought 2 pens and a cap for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) ₹198 (c) ₹100 (d) not enough info
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
18. 18.🧩 Rohan bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹40 (d) ₹20
19. 19.🧩 Ananya bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹30 (c) ₹20 (d) not enough info
20. 20.🧩 Nisha is 11 years old. Meera is older than Nisha. How old is Meera? (a) 12 (b) 13 (c) 16 (d) not enough info
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 5 PM (c) 2 PM (d) not enough info
23. 23.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
24. 24.🧩 Aarav bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹10 (c) ₹15 (d) ₹60
25. 25.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
26. 26.🧩 Vihaan is 11 years old. Meera is 2 years older than Vihaan. How old is Meera? (a) 2 (b) 14 (c) not enough info (d) 13
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Nisha bought 5 kites and a cap for ₹115 in all. Each kite cost the same. What did one kite cost? (a) ₹115 (b) ₹23 (c) ₹110 (d) not enough info
29. 29.🧩 Nisha bought 2 pens for ₹20 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹20 (c) ₹10 (d) not enough info
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
31. 31.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
35. 35.🧩 Rohan bought 4 mangoes and a bag for ₹230 in all. Each mango cost the same. What did one mango cost? (a) ₹230 (b) ₹57 (c) ₹226 (d) not enough info
36. 36.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
38. 38.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
39. 39.🧩 Saanvi is 12 years old. Meera is 5 years older than Saanvi. How old is Meera? (a) 18 (b) not enough info (c) 17 (d) 5
40. 40.🧩 Diya is 9 years old. Kabir is 7 years older than Diya. How old is Kabir? (a) 16 (b) not enough info (c) 7 (d) 17

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