Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 513 · 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 colour of ink (b) the page number (c) your handwriting (d) what facts are given
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Arjun bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹15 (c) ₹20 (d) not enough info
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
5. 5.🧩 Kabir bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹15 (c) ₹45 (d) ₹20
6. 6.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 63 (c) 15 (d) 54
7. 7.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 32 (b) 12 (c) not enough info (d) 36
8. 8.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 3 PM (c) 7 PM (d) 6 PM
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (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.🧩 Nisha is 11 years old. Meera is older than Nisha. How old is Meera? (a) not enough info (b) 16 (c) 12 (d) 13
12. 12.🧩 Rohan bought 4 kites for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹140
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
14. 14.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
15. 15.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
16. 16.🧩 Ananya is 8 years old. Ishaan is older than Ananya. How old is Ishaan? (a) not enough info (b) 13 (c) 9 (d) 10
17. 17.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
19. 19.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
20. 20.🧩 Kabir bought 3 balls and a water bottle for ₹85 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹82 (c) ₹28 (d) ₹85
21. 21.🧩 Nisha bought 3 pens and a lunch box for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹137 (b) ₹46 (c) not enough info (d) ₹140
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
23. 23.🧩 Kabir is 7 years old. Nisha is 2 years older than Kabir. How old is Nisha? (a) 9 (b) not enough info (c) 10 (d) 2
24. 24.🧩 Nisha bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) ₹10 (b) ₹20 (c) ₹15 (d) not enough info
25. 25.🧩 Kabir bought 2 mangoes for ₹20 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹10
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
29. 29.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Diya bought 2 balls for ₹70 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹70
31. 31.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
33. 33.🧩 Saanvi bought 3 kites and a lunch box for ₹215 in all. Each kite cost the same. What did one kite cost? (a) ₹71 (b) not enough info (c) ₹215 (d) ₹212
34. 34.🧩 Vihaan is 9 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 14 (b) not enough info (c) 10 (d) 11
35. 35.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
38. 38.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 80 (c) 8 (d) 16
39. 39.🧩 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
40. 40.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 7 (b) 16 (c) 12 (d) not enough info

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