Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 418 · 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.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 16 (b) not enough info (c) 72 (d) 64
2. 2.🧩 Arjun is 9 years old. Saanvi is 5 years older than Arjun. How old is Saanvi? (a) 5 (b) not enough info (c) 15 (d) 14
3. 3.🧩 Kabir bought 3 markers and a cap for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹47 (d) ₹16
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
5. 5.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
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
7. 7.🧩 Arjun bought 3 kites and a cap for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹177 (c) not enough info (d) ₹180
8. 8.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
12. 12.🧩 Arjun bought 4 pens and a cap for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹32 (b) ₹130 (c) ₹126 (d) not enough info
13. 13.🧩 Nisha bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹20 (d) ₹25
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
16. 16.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Saanvi is 10 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 15 (b) 11 (c) not enough info (d) 12
20. 20.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
21. 21.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
24. 24.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Rohan is 11 years old. Diya is 8 years older than Rohan. How old is Diya? (a) 19 (b) 20 (c) 8 (d) not enough info
26. 26.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
28. 28.🧩 Arjun bought 6 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹90 (b) not enough info (c) ₹20 (d) ₹15
29. 29.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
31. 31.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
32. 32.🧩 Arjun is 7 years old. Tara is 6 years older than Arjun. How old is Tara? (a) not enough info (b) 13 (c) 6 (d) 14
33. 33.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 56 (b) not enough info (c) 49 (d) 14
34. 34.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
35. 35.🧩 Kabir bought 3 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹120
36. 36.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 40 (b) 13 (c) not enough info (d) 48
37. 37.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
38. 38.🧩 Rohan bought 4 pens and a water bottle for ₹180 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹180 (d) ₹176
39. 39.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True

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