Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 355 · 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 of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
2. 2.🧩 Tara is 6 years old. Aarav is 5 years older than Tara. How old is Aarav? (a) 12 (b) not enough info (c) 11 (d) 5
3. 3.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
4. 4.🧩 Diya is 8 years old. Saanvi is older than Diya. How old is Saanvi? (a) 13 (b) 10 (c) not enough info (d) 9
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
7. 7.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
8. 8.🧩 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
9. 9.🧩 Meera bought 4 kites and a lunch box for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹200 (b) ₹50 (c) ₹196 (d) not enough info
10. 10.🧩 Kabir is 12 years old. Aarav is 8 years older than Kabir. How old is Aarav? (a) 21 (b) 20 (c) 8 (d) not enough info
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.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
13. 13.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
14. 14.🧩 Kabir is 8 years old. Rohan is older than Kabir. How old is Rohan? (a) 10 (b) 13 (c) not enough info (d) 9
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
16. 16.🧩 A box has 7 rows of apples, with 7 in each row. How many apples are in the box? (a) 56 (b) not enough info (c) 14 (d) 49
17. 17.🧩 Ishaan is 7 years old. Vihaan is 5 years older than Ishaan. How old is Vihaan? (a) 5 (b) 12 (c) not enough info (d) 13
18. 18.🧩 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
19. 19.🧩 Kabir bought 3 kites and a water bottle for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) ₹87 (c) ₹30 (d) not enough info
20. 20.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
21. 21.🧩 Kabir is 11 years old. Rohan is 4 years older than Kabir. How old is Rohan? (a) 15 (b) not enough info (c) 4 (d) 16
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Rohan is 12 years old. Diya is 5 years older than Rohan. How old is Diya? (a) not enough info (b) 5 (c) 18 (d) 17
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
28. 28.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) 9 PM (d) not enough info
29. 29.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
30. 30.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
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
33. 33.🧩 Vihaan bought 6 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) not enough info (c) ₹144 (d) ₹25
34. 34.🧩 Rohan bought 2 notebooks and a cap for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) ₹138 (c) ₹140 (d) not enough info
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
36. 36.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
37. 37.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 48 (c) 13 (d) 42
38. 38.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
40. 40.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 25 (b) not enough info (c) 9 (d) 20

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